A very important point to note is that the paths should be the relative paths. This means that the paths would be what you would type on the machine to get to the files, not what you would type in the address box in a browser.

Examples:Full path would be http://www.yoursite.com/path/to/error/pageAbsolute path would be /home/yoursite.com/path/to/error/pageRelative path would be /path/to/error/page